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【单选题】
下列说法正确的是 [     ]
A.
加德罗常数是人们规定的数，没有单位
B.
0. 012 kg 12 C中所含有的碳原子数的精确值是6. 02×10 23
C.
H 2 O的相对分子质量为18，1mol水的质量也是18
D.
1.5 mol NaCl中含有NaCl的微粒数为9.03×10 23
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参考答案：
举一反三
【判断题】安全带应在使用2年后，按批量购入情况，抽验一次。安全带的使用期限为3-5年，发现异常应提前报废。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：M: I thought you would have the repairman come to fix the water heater. W: I tried calling him all day, but his phone apparently was out of order. Q: Why didn't the woman have the repairman come?...
A.
The repairman's phone was not working.
B.
Her phone wasn't working.
C.
She couldn't wait at home.
D.
Her husband wasn't at home.
查看完整题目与答案
【单选题】要产生 [50, 99] 之间的随机整数可以使用以下哪个表达式?
A.
(int)(50+Math.random()*47)
B.
50+(int)(Math.random()*50)
C.
(int)Math.random()*99
D.
50+(int)Math.random()*50
查看完整题目与答案
【单选题】听力原文：M: The coat you tried on was really nice and reasonably priced. W: I'd have bought it right away if they'd had it in my size. Q: What can be inferred about the woman? (15)
A.
She didn't buy the coat.
B.
She thought the coat was too expensive.
C.
She bought the coat with satisfaction.
D.
The coat fit her quite well.
查看完整题目与答案
【单选题】在确定安全带使用期限时应注意：安全带使用( )年后，应按批量购入情况抽检一次，若合格，该批安全带可继续使用。
A.
1
B.
2
C.
3
D.
4
查看完整题目与答案
【单选题】下列对课文《像山那样思考》有关内容的分析,不正确的一项是( )
A.
狼越少，鹿就越多，没有狼的地方就是猎人的天堂。
B.
每一种活着的东西都会对狼的嗥叫有所反应。
C.
山中失去了狼，往往会间接导致鹿群的灭亡。
D.
人类应该像山那样去思考，否则就会受到自然界的惩罚。
查看完整题目与答案
【单选题】饭店玄关出口必须有24小时的照明指示灯和()的不间断监控。
A.
12小时
B.
16小时
C.
20小时
D.
24小时
查看完整题目与答案
【单选题】听力原文：M: Have you called John to come and fix the TV? W: I tried reaching him again and again, but it seemed his phone was out of order. Q: Why couldn't the woman get John to come? (13)
A.
John's phone wasn't working.
B.
John wasn't at home when she called.
C.
The woman didn't get the right phone number of John's.
D.
John was too busy to come.
查看完整题目与答案
【单选题】机体对于内外环境变化发生反应的能力或特性,称为
A.
新陈代谢
B.
兴奋性
C.
适应性
D.
生殖
E.
内分泌
查看完整题目与答案
【单选题】安全带应在使用(    )年后，按批量购入情况，抽验一次。
A.
4
B.
3
C.
2
查看完整题目与答案
相关题目：
【判断题】安全带应在使用2年后，按批量购入情况，抽验一次。安全带的使用期限为3-5年，发现异常应提前报废。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：M: I thought you would have the repairman come to fix the water heater. W: I tried calling him all day, but his phone apparently was out of order. Q: Why didn't the woman have the repairman come?...
A.
The repairman's phone was not working.
B.
Her phone wasn't working.
C.
She couldn't wait at home.
D.
Her husband wasn't at home.
查看完整题目与答案
【单选题】要产生 [50, 99] 之间的随机整数可以使用以下哪个表达式?
A.
(int)(50+Math.random()*47)
B.
50+(int)(Math.random()*50)
C.
(int)Math.random()*99
D.
50+(int)Math.random()*50
查看完整题目与答案
【单选题】听力原文：M: The coat you tried on was really nice and reasonably priced. W: I'd have bought it right away if they'd had it in my size. Q: What can be inferred about the woman? (15)
A.
She didn't buy the coat.
B.
She thought the coat was too expensive.
C.
She bought the coat with satisfaction.
D.
The coat fit her quite well.
查看完整题目与答案
【单选题】在确定安全带使用期限时应注意：安全带使用( )年后，应按批量购入情况抽检一次，若合格，该批安全带可继续使用。
A.
1
B.
2
C.
3
D.
4
查看完整题目与答案
【单选题】下列对课文《像山那样思考》有关内容的分析,不正确的一项是( )
A.
狼越少，鹿就越多，没有狼的地方就是猎人的天堂。
B.
每一种活着的东西都会对狼的嗥叫有所反应。
C.
山中失去了狼，往往会间接导致鹿群的灭亡。
D.
人类应该像山那样去思考，否则就会受到自然界的惩罚。
查看完整题目与答案
【单选题】饭店玄关出口必须有24小时的照明指示灯和()的不间断监控。
A.
12小时
B.
16小时
C.
20小时
D.
24小时
查看完整题目与答案
【单选题】听力原文：M: Have you called John to come and fix the TV? W: I tried reaching him again and again, but it seemed his phone was out of order. Q: Why couldn't the woman get John to come? (13)
A.
John's phone wasn't working.
B.
John wasn't at home when she called.
C.
The woman didn't get the right phone number of John's.
D.
John was too busy to come.
查看完整题目与答案
【单选题】机体对于内外环境变化发生反应的能力或特性,称为
A.
新陈代谢
B.
兴奋性
C.
适应性
D.
生殖
E.
内分泌
查看完整题目与答案
【单选题】安全带应在使用(    )年后，按批量购入情况，抽验一次。
A.
4
B.
3
C.
2
查看完整题目与答案
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