井下探放水时，一台钻机组人员的配置不得少于（）人。A.一 B.二 C.三

In order to know a foreign language thoroughly(彻底地), four things are necessary. Firstly, we must understand the language when we hear  ______小题1:________ spoken.. Secondly, we must be able to speak it correctly with confidence(自信) and without hesitation(犹豫). _____小题2:_______ , we must be able to read the language , and fourthly, we must be able to write it. We must be able to make sentences that are grammatically correct.

There is no easy way to success _____小题3:_______ language learning. _____小题4:________ good memory is of great help, but it is not enough only _____小题5:________(memorize) rules from a grammar book. It is not much use learning by heart long list of words and ______小题6:_________meaning, studying the dictionary and so on. We must learn by using the language. _______小题7:_______we are satisfied with only a few rules we have memorized, we are not really learning the language. “Learn through use” is a good piece of _____小题8:______(advise) for those ______小题9:______are studying a new language. Practice is important. We must practise speaking and ____小题10:____(write) the language whenever we can.

对照元素周期表，下列叙述中不正确的是(      )

A．在金属元素与非金属元素的分界线附近可以寻找制备半导体材料的元素

B．过渡元素中可寻找制备催化剂及耐高温、耐腐蚀的元素

C．在非金属元素区域可以寻找制备新型农药材料的元素

D．周期表中第Ⅷ族元素种类最多

允许年度出口收汇额在等值( )以上，且年度外汇支出额在等值( )以上，享有外汇进出口经营权，财务状况良好，两年内没有违反外汇管理规定的中资企业开立外汇结算账户。

A．1O0万美元；10万美元

B．200万美元；20万美元

C．300万美元；30万美元

D．500万美元；50万美元

（2007，17）属于任何犯罪构成必不可少的要件的是（ ）。

A．犯罪目的

B．犯罪对象

C．危害行为

D．犯罪时间

鉴定葡萄球菌致病性的重要指标是（）

A.产生溶血素

B.产生血浆凝固酶

C.产生色素

D.具有SPA

E.发酵葡萄糖