He is over fifty, but he looks as if he（）only in his thirties.

[单选题]四显示自动闭塞区段出站色灯信号机显示（）——准许列车由车站出发，开往半自动闭塞或自动站间闭塞区间。

[单选题]信息进攻力量中不包括（）。

[多选题]电力电缆设备的标志牌要与下列哪些资料名称一致（）。

[单选题]下列各组汉字，象形字、指事字、会意字、形声字四种都有的一组是（）

[单选题]在牙的发育阶段，服用过量的四环素族药物，使牙着色的是（　　）。

[单选题]根据心绞痛的严重程度可分（）

[单选题]若欲显示有信号丢失的病变如动脉瘤，血管狭窄等，常采用（）

[填空题]Na+跨膜转运的方式为（）。

[单选题]对滑动轴承的增压采用（）润滑。

[单选题]关于心脏各种震颤的描述，错误的是（　　）。

[单选题]He is over fifty, but he looks as though he（）only in his thirties.

[单选题]He is over fifty, but he looks as though he（）only in his thirties.

[单选题]He is over fifty, but he looks as if he（）only in his thirties.

[单选题]He is over fifty, but he looks as if he（）only in his thirties.

[单选题]A：How much（）that come to ?B：Two yuan fifty fen .

[单选题]The board room can（）fifty people.

[单选题]Fifty cases of Green Tea you sent us were found to be badly damaged. This was ap...

[单选题]One of the fifty states in the United States ______ an island, Hawaii.

[问答题]For the last fifty years, the globe has been warming (1)____.　　It is true that t...

[单选题]The company has purchased one hundred and fifty new servers. The server administ...