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【单选题】
下列叙述中正确的是（ ）A.
含有离子键的化合物一定是离子化合物
B.
具有共价键的化合物一定是共价化合物
C.
在化合物CaCl 2 中，两个氯离子之间也存在离子键
D.
化学键是分子中多个原子之间强烈的相互吸引作用
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举一反三
【单选题】What does the man mean?
A.
He doesn't want to go to his friend's party.
B.
He will go to see the film.
C.
He will go to his friend's party.
【简答题】L ook at the two receipts. Use words you find on these receipts to have a match:
【单选题】— _______ your friend play the guitar? —Yes， he can， but he can；t play it well．A． Mu
A.
23．— _______ your friend play the guitar? —Yes， he can， but he can；t play it well． A． Must
B.
Can
C.
Should
D.
Need
【简答题】A．They want to go downtown. B．He wants to go to the park, but she doesn't. C．He doesn't know where to park the car. D．He wants to find out where the park is.
【判断题】Cornell University was founded in 1865 by Ezra Cornell and Andrew Dickson White.
A.
正确
B.
错误
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