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【多选题】
Why should a visitor to a large firm make an appointment in advance?A.
Because executives are usually quite busy.
B.
Because executives often have to go out on business.
C.
Because executives often do not have much time for visitors.
D.
Because executives are often away from the office.
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举一反三
【单选题】The end products of the first stage of photosynthesis that drive the second stage are( )
A.
ADP and NAD
B.
ATP and NADPH
C.
H 2 O and ADP
D.
CO 2
E.
low-energy compounds
【单选题】关于胸壁结核的临床表现，下列哪项是错误的？
A.
病人一般多无明显全身症状
B.
胸壁脓肿为热脓肿
C.
皮下溃破形成经久不愈的溃疡
D.
可形成曲折、分叉多的窦道
E.
脓液黄白色稀薄，内含干酪样物质
【多选题】题干:实验室发生紧急事故时,正确的应对策略是( )。
A.
发生大的突发事故后,人身安全才是最重要的,事故现场人员首先应尽快有序地从安全通道撤离,等事故得到控制之后再回来处理其他事情
B.
听从指挥
C.
发生小型着火事故,应防止火势蔓延(采取切断电源、移走易燃物品、灭火等措施)
D.
如被困室内(电梯内),应设法呼救
【单选题】At the final stage o negotiation, an agreement needs to be signed. A signing ceremony is ____.
A.
a useful common practice
B.
a ritual
C.
both the above
D.
unnecessary
【单选题】In the first stage of the conservation program ______.
A.
eggs were removed from the nests of wild condors
B.
female condors were captured and studied carefully
C.
scientists and zookeepers tried to create genetic diversity
D.
condors were induced to lay more than one egg
【单选题】设消费函数为 ,其中虚拟变量D=(1,城镇家庭;0,农村家庭) ,当统计检验表明下列哪项成立时,表示城镇家庭与农村家庭有一样的消费行为 ( )
A.
，
B.
，
C.
，
D.
，
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