山地按构造形式的分类是()。
A.断块山、褶皱断块山和褶皱山
B.断块山、褶皱断块山和丘陵
C.剥蚀残丘、褶皱断块山和褶皱山
D.丘陵、褶皱断块山和褶皱山
参考答案:A
根据下列句子所给汉语意思写出空缺处单词,或根据所给词写出正确形式。
小题1:We're in the building _________ (在…对面) the government offices.
小题2:________(政治上) and economically this is an extremely difficult question.
小题3:Though ten years old, this book is highly ___________ (推荐).
小题4:Delivery times are arranged at your __________(方便).
小题5:I have no doubt that the man is guilty and that he deserves __________(惩罚).
肠道杆菌的O抗原存在于()。
A、胞膜
B、荚膜
C、鞭毛
D、脂多糖
E、肽聚糖