问两个题

夜见泽

His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in now currently temperate areas.

(A)in which great ice sheets had existed in now currently temperate areas

(B)in which great ice sheets existed in what are now temperate areas

(C)when great ice sheets existed where there were areas now temperate

(D)when great ice sheets had existed in current temperate areas

(E)when great ice sheets existed in areas now that are temperate



我只想问 B中now的位置可以这样放么 为什么？

Proponents of artificial intelligence they say will be able to make computers that can understand English and other human languages, recognize objects, and reason as an expertdoes-computers that will be used to diagnose equipment breakdowns, deciding whether to authorize a loan, or other purposes such as these.

(A) as an expert does--computers that will be used to diagnose equipment breakdowns, deciding whetherto authorize a loan, or other purposes such as these

(B) as an expert does, which may be used for purposes such as diagnosing equipment breakdowns or deciding whether to authorize a loan

(C) like an expert--computers that will be used for such purposes as diagnosing equipment breakdowns or deciding whether to authorize a loan

(D) like an expert, the use of which would be for purposes like the diagnosis of equipment breakdowns or the decision whether or not a loan should be authorized

(E) like an expert, to be used to diagnose equipment breakdowns, deciding whether to authorize a loan or not, or the like            这题没看懂破折号的用法？答案是c，整句话是什么意思？

ruolanbing

对于第一题，now可以这么放哦！因为now做adv修饰temperate！第二个题破折号应该是进一步解释说明？（应该是）和冒号功能很像，貌似冒号只能解释就近的名词神马的，而破折号不必。as 后面应该加clause，like+n.；至于举例说明such as！！hope helps  

zxppx

第一题可以把temperate areas当做一个名词“温带地区”，用now来修饰，说明现在是温带地区
第二题，破折号“解释说明”，说明expert的作用像计算机，能够诊断设备故障和决定是否批准贷款！

gumoc

破折号的用法：1 解释说明 （类似于插入语）2 表示转折、反讽等文章态度的转变。

kiwifoodtown

同LS各位。