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【简答题】
下表是某种常见金属的部分性质: 将该金属投入稀盐酸中,可产生大量的无色气体,根据上述信息回答下列问题: 颜色、状态 硬度 密度 熔点 导电性 导热性 延展性 银白色固体 较软 2.70g/cm 3 660.4℃ 良好 良好 良好 (1)试推断该金属可能的一种用途______. (2)该金属的活动性比铜______. (3)请自选试剂,设计实验探究该金属与铁的活动性强弱,并完成下表: 你的一种猜想 验证方法 现象 结论 鉴别首饰的真伪,纯金首饰金光闪闪,不易生锈,深受人们的喜爱.有一种外形与纯金相似的黄铜是由铜和锌组成的合金(各自保持单质的化学性质),市面上有人用黄铜制成首饰冒充黄金制品高价出售,欺骗消费者.请你设计简单合理的实验方案,鉴别首饰的真伪,揭穿他们的欺骗行为.
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【简答题】He didn’t go for a walk but stayed at home.(改为同义句) He stayed at home__________ __________going for a walk.
【单选题】La Belgique produit _________ tonnes de chocolat par an, la majorité destiné à l'exportation.
A.
6 500
B.
650
C.
65 000
D.
650 000
【单选题】---What did you do last weekend, Jack? --- Well, I ____ to see a film, but in the end I stayed home doing nothing.
A.
was going
B.
has gone
C.
went
D.
had gone
【单选题】-My family and I stayed at home watching TV this weekend. It's relaxing. -______. But I think it's boring. [     ]
A.
So we did
B.
So did we
C.
I agree with you
D.
I like it
【多选题】传统行业向互联网的转型,电商的快速崛起,给物流带来哪些挑战?()
A.
全渠道零售的挑战
B.
订单量的爆炸式增长
C.
成本和安全控制
【简答题】I__________go there this morning, so I stayed at home.
【单选题】关于小儿中度等渗性脱水正确的是( )
A.
失水量占体重的6%,血清钠155mmol/L;
B.
失水量占体重的3%,血清钠l35mmol/L
C.
失水量占体重的7%,血清钠120mmol/L:
D.
失水量占体重的8%,血清钠140mmol/L
E.
失水量占体重的11%,血清钠140mmol/L;
【判断题】晚辈给长辈倒茶: 长辈可以用一只手指在茶杯边缘轻敲一下,表示尊重。或者,如果长辈遇到比较欣赏的晚辈,可以用中指在茶杯边缘轻敲三下,表达你的欣赏。
A.
正确
B.
错误
【简答题】I’d rather stayed at home when it rains outside. A B C D ___________
【单选题】By mentioning the 15-year-old boy, Bill Gates wants to tell the readers that ______.
A.
students should develop a deep interest in computers at an early age
B.
students should realize the importance of receiving a broad education
C.
students should not take a deep interest in computers too early
D.
students should take various science courses
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