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【判断题】
*同层地衣中的藻类细胞和菌丝混合为一体,无单独藻胞层存在。A.
正确
B.
错误
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【单选题】We shouldn't do _____ at the table through the whole day, and we need to do more _____ if we have time to keep healthy. [ ]
A.
exercise; exercises
B.
exercises; exercises
C.
exercise; exercise
D.
exercises; exercise
【简答题】用 so that/in oder that/ in oder to/ so as to。 1. She worked hard ____ everything would be ready in time. 2. Nothing more was heard from him ____ we began to wonder if he was dead. 3. He got up early...
【简答题】完形填空。 Which is the best way to learn a foreign language? We remembered that we all learned our own language when we were 1 , if we can learn a second language in the same way, it won't seem to be so 2...
【单选题】--How about buying Tim a mobile phone ? After all, he isn’t a boy any more. --I think it’s necessary, for we sometimes want to make sure if he ____ for dinner.
A.
will come
B.
comes
C.
has come
D.
would come
【单选题】If there were no examinations, we should have＿＿＿＿＿at school．
A.
the happiest time
B.
a more happier time
C.
much happiest time
D.
a much happier time
【简答题】写出下列化合物的结构式 (1) 邻苯二胺 (2) 邻甲基苯胺 (3) 对氨基苯甲酸 (4) 盐酸甲乙胺 (5) 4,4'- 二羟基偶氮苯 (6) 叔丁醇和叔丁胺 (7) 氯化甲基乙基正丙基苯基铵 ( 8 )氯化重氮苯
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