求助两道GWD

sayysong

A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color.The inventor of the machine claims that it will reduce labor costs by virtually eliminating the need for manual weeding.
主旨在于distinguish ... by differences in shade of color.

Which of the following is a consideration in favor of the company’s implementing its plan to develop the prototype? (D)
注意in favor of，表示问的是support this implementation的选项。

A.There is a considerable degree of variation in shade of color between weeds of different species.
只说了weeds，没说plants，片面，out。

B.The shade of color of some plants tends to change appreciably over the course of their growing season.
其一只说了plants，其二如果plants本身颜色变化大，则给区分增加了难度，是weaken，故out.

C.When crops are weeded manually, overall size and leaf shape are taken into account in distinguishing crop plants from weeds.
引入size and leaf shape，都是新机器不具备的功能，weaken，out。

D.Selection and genetic manipulation allow plants of virtually any species to be economically bred to have a distinctive shade of color without altering their other characteristics.
围绕color，覆盖面广plants of virtually any species，最主要的还without altering other characteristics，理想至极，Bingo！

E.Farm laborers who are responsible for the manual weeding of crops carry out other agricultural duties at times in the growing season when extensive weeding is not necessary.
提到的是farm laborer，irrelevant，out。

sayysong

The spacing of the four holes on a fragment of a bone flute excavated at a Neanderthal campsite is just what is required to play the third through sixth notes of the diatonic scale—the seven-note musical scale used in much of Western music since the Renaissance. Musicologists therefore hypothesize that the diatonic musical scale was developed and used thousands of years before it was adopted by Western musicians.
出土一节骨笛残片，上面有四个洞，正好够演奏全音阶（7个音洞）的三至六音位。于是hypothesize——全音阶早在几千年前就出现了。

Which of the following, if true, most strongly supports the hypothesis?
hypothesis的主旨在于“全音阶的存在”。

A.Bone flutes were probably the only musical instrument made by Neanderthals.
关键字bone flutes, Neanderthals，与题目的diatonic musical scale无关，out。

B.No musical instrument that is known to have used a diatomic scale is of an earlier date than the flute found at the Neanderthal campsite.
偏重于musical instrument，而非diatonic scale本身，有失偏颇，out。

C.The flute was made from a cave-bear bone and the campsite at which the flute fragment was excavated was in a cave that also contained skeletal remains of cave bears.
讲到了做骨笛的材料，可以证明这个flute是由当地Neanderthals制作而不是舶来品，与diatonic scale还是没有关系，out。

D.Flutes are the simplest wind instrument that can be constructed to allow playing a diatonic scale.
关键字simplest，未涉及“几千年，早于”之类的时间相关，irrelevant，out。

E.The cave-bear leg bone used to make the Neanderthal flute would have been long enough to make a flute capable of playing a complete diatonic scale.
有够长的器材，又有残片的存在，组合在一起，是不是可以联想（假设）到该残片就是七音洞的一部分，由此七音洞老早就存在了。

个人浅见，仅供参考！