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【单选题】
下列做法中,符合安全用电原则的是A.
在电线上晾晒衣服
B.
电灯的开关装在火线上
C.
不切断总开关就进行电路维修
D.
将洗衣机的三脚插头改为两脚插头使用
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举一反三
【单选题】—Any suggestion? —You'd better______the last sentence as it is rather misleading． —Sounds reasonable．Then could you ______ a good ending to it?
A.
put out; increase
B.
leave out; add
C.
pick out; find
D.
knock out; choose
【单选题】下列有关对群落特点的表述，说法正确的是( )。
A.
群落内的各种生物都是偶然散布的、孤立的，相互之间不存在物质循环和能量转移的复杂联系
B.
在随时间变化的过程中，生物群落经常改变其外貌，并具有一定的顺序状态，即具有发展和演变的动态特征
C.
群落的特征就是其组成物种的特征的简单总和
D.
在一个群落中，物种和生物个体的数量是单一的
【单选题】I think it is you rather than the student who____ for being late for the speech.
A.
is to blame
B.
are to blame
C.
is to be blamed
D.
are to be blamed
【简答题】阅读理解。 It is the summer of 1776. Thomas Jefferson is not happy. He'd rather be home in Virginia than attending Philadelphia's Continental Congress(大陆会议) Thomas Jefferson knew he had a job to do. Import...
【简答题】仿造例句,用 it 改写句子 Eg : To learn everything is rather difficult. It is rather difficult to learn everything. 1) To a foreign language is very helpful. 2) To know the main facts is not quite enough....
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