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【单选题】
已知四个命题，其中正确的命题是         （   ） ①若直线 l //平面 ，则直线 l 的垂线必平行平面 ； ②若直线 l 与平面 相交，则有且只有一个平面，经过 l 与平面 垂直； ③若一个三棱锥每两个相邻侧面所成的角都相等，则这个三棱锥是正三棱锥； ④若四棱柱的任意两条对角线都相交且互相平分，则这个四棱柱为平行六面体．
A.
①
B.
②
C.
③
D.
④
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参考答案：
举一反三
【单选题】He was out of work due to the global financial crisis; he was sad and discouraged, feeling that he _ his family.
A.
failed
B.
abandoned
C.
ignored
D.
betrayed
查看完整题目与答案
【单选题】After being on unemployment for a time due to the financial crisis, he was offered job he now holds.
A.
/; the
B.
the; a
C.
the; the
D.
a; a
查看完整题目与答案
【单选题】听力原文：We don't have enough information for our financial plan, but it is due tomorrow. So I'm afraid we'll just have to make do with what we have got. (25)
A.
We'll ask for more time to finish the financial plan.
B.
We'll look for more information for the plan to be implemented.
C.
I'm afraid we'll turn in the financial plan later than expected.
D.
We'll have to finish the plan with the materials available now.
查看完整题目与答案
【单选题】下列不属于氟喹诺酮类药物的药理学特性的是（）。
A.
抗菌谱广
B.
口服吸收好
C.
与其他抗菌药物无交叉耐药性
D.
不良反应较广
E.
体内分布较广
查看完整题目与答案
【单选题】接闪线属于避雷装置中的一种,它主要用来保护( )
A.
变配电设备
B.
房屋较大面积的建筑物
C.
高压输电线路
查看完整题目与答案
【单选题】鸦片战争前，中英进行贸易时，中国出口的商品不包括()。
A.
丝绸
B.
茶叶
C.
瓷器
D.
餐具
查看完整题目与答案
【单选题】Due to the financial crisis, developing countries
A.
found export fatalism more fit to them.
B.
are having problems in export.
C.
began to keep their currencies expensive.
D.
became the certain cause of America's financial crisis.
查看完整题目与答案
【单选题】餐饮服务提供者委托清洗消毒餐具、饮具的，应当委托的主体包括？（）
A.
食品药品监督管理部门指定的餐具、饮具集中消毒服务单位
B.
食品药品监督管理部门指定并且符合《食品安全法》规定条件的餐具、饮具集中消毒服务单位
C.
符合《食品安全法》规定条件的餐具、饮具集中消毒服务单位
D.
以上都不是
查看完整题目与答案
【单选题】The company has been forced to ______ 200 employees due to financial problems.
A.
dilapidate
B.
tarry
C.
sprawl
D.
jettison
查看完整题目与答案
【单选题】The company's profit drop _____ in the last three months of 2009 due to the financial crisis. [     ]
A.
narrowly
B.
sharply
C.
roughly D widely
查看完整题目与答案
相关题目：
【单选题】He was out of work due to the global financial crisis; he was sad and discouraged, feeling that he _ his family.
A.
failed
B.
abandoned
C.
ignored
D.
betrayed
查看完整题目与答案
【单选题】After being on unemployment for a time due to the financial crisis, he was offered job he now holds.
A.
/; the
B.
the; a
C.
the; the
D.
a; a
查看完整题目与答案
【单选题】听力原文：We don't have enough information for our financial plan, but it is due tomorrow. So I'm afraid we'll just have to make do with what we have got. (25)
A.
We'll ask for more time to finish the financial plan.
B.
We'll look for more information for the plan to be implemented.
C.
I'm afraid we'll turn in the financial plan later than expected.
D.
We'll have to finish the plan with the materials available now.
查看完整题目与答案
【单选题】下列不属于氟喹诺酮类药物的药理学特性的是（）。
A.
抗菌谱广
B.
口服吸收好
C.
与其他抗菌药物无交叉耐药性
D.
不良反应较广
E.
体内分布较广
查看完整题目与答案
【单选题】接闪线属于避雷装置中的一种,它主要用来保护( )
A.
变配电设备
B.
房屋较大面积的建筑物
C.
高压输电线路
查看完整题目与答案
【单选题】鸦片战争前，中英进行贸易时，中国出口的商品不包括()。
A.
丝绸
B.
茶叶
C.
瓷器
D.
餐具
查看完整题目与答案
【单选题】Due to the financial crisis, developing countries
A.
found export fatalism more fit to them.
B.
are having problems in export.
C.
began to keep their currencies expensive.
D.
became the certain cause of America's financial crisis.
查看完整题目与答案
【单选题】餐饮服务提供者委托清洗消毒餐具、饮具的，应当委托的主体包括？（）
A.
食品药品监督管理部门指定的餐具、饮具集中消毒服务单位
B.
食品药品监督管理部门指定并且符合《食品安全法》规定条件的餐具、饮具集中消毒服务单位
C.
符合《食品安全法》规定条件的餐具、饮具集中消毒服务单位
D.
以上都不是
查看完整题目与答案
【单选题】The company has been forced to ______ 200 employees due to financial problems.
A.
dilapidate
B.
tarry
C.
sprawl
D.
jettison
查看完整题目与答案
【单选题】The company's profit drop _____ in the last three months of 2009 due to the financial crisis. [     ]
A.
narrowly
B.
sharply
C.
roughly D widely
查看完整题目与答案
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