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【简答题】
周口店的发掘工作继1929年发现第一个北京人头骨化石之后,到1937年抗日战争全面爆发,前后进行了( )次。
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举一反三
【单选题】When the immigration officer asks you the questions, you should _______.
A.
Be nervous and keep silent.
B.
Keep clam and give short answers.
C.
Excited and talk a lot to show your English ability.
D.
Ignore it.
【单选题】直流电动机磁极的作用是()
A.
产生旋转磁场
B.
产生固定磁场
C.
产生电磁转矩
D.
产生电动势
【单选题】直流电动机主磁极的作用是()。
A.
产生主磁场
B.
产生电枢电流
C.
改变换向性能
D.
产生换向磁场
【单选题】根管预备的注意事项中,哪一条是不正确的()
A.
首先测定工作长度
B.
器械只能到达根尖狭窄部
C.
用根管钻或锉时应逐号进行
D.
每换一只器械前行根管冲洗
E.
根管应尽量扩大
【单选题】All masters,owners and agents()that vessels when requesting Immigration and Port Health Clearance must anchor at the designated Immigration and Quarantine Anchorage and exhibit the appropriate signals...
A.
remind
B.
is reminded
C.
are reminded
D.
to remind
【单选题】My heart sank when the man at the immigration counter gestured to the back room. I'm an American born and raised,and this was Miami,where I live,but they weren't quite ready to let me in yet. 'Please ...
A.
she and her husband returned from Jamaica
B.
her name was similar to a terrorist's
C.
she had been held in Montreal
D.
she had spoken at a book event
【单选题】直流电动机磁极的作用是( )
A.
改变电流方向
B.
产生磁场
C.
切割磁感线
D.
开关作用
【单选题】When was the immigration of Chinese laborers stopped?
A.
1882.
B.
1883.
C.
1884.
D.
1885.
【单选题】When the immigration officer asks you the questions, you should _______
A.
Be nervous and keep silent
B.
Keep clam and give short answers.
C.
Excited and talk a lot to show your English ability .
D.
Ignore him
【单选题】根管预备的注意事项中,哪一条是不正确的
A.
首先测定工作长度
B.
器械只应到达根尖狭窄部
C.
用根管钻或锉时,应逐号进行
D.
根管应尽量扩大为好
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