据图示资料推测，该国

【名词&注释】

稀盐酸(dilute hydrochloric acid)、蒸馏水(distilled water)、容量瓶(volumetric flask)、世纪末(century end)、青壮年人、人口再生产(population reproduction)、玻璃棒(glass rod)、稀释浓硫酸

[单选题]据图示资料推测，该国

A. 自20世纪70年代，人口再生产^{(population reproduction)}进入现代型
B. 可能位于欧洲
C. 1990年人口达到900万
D. 20世纪末青壮年人口比重偏大

查看答案&解析查看所有试题

学习资料：

[单选题]What made the author laugh?

A. His own behavior
B. His wife’s suggestion
C. His changeable feelings.
D. His wife’s sweet kiss.

[单选题]Jenny nearly missed the flight doing too much shopping.

A. as a result of
B. on top of
C. in front of
D. in need of

[单选题]What has the woman decided to do on Sunday aftermoon?

A. To attend a wedding+
B. To visit an exhibition.
C. To meet a friend.

[单选题]How did the acidcent happen ?

A. a longhit a car
B. a car ran into a lorry
C. a bank clerk rushed into the street .

[单选题]下列与实验相关的叙述正确的是

A. 稀释浓硫酸时，应将蒸馏水沿玻璃棒^{(glass rod)}缓慢注入浓硫酸中
B. 配制溶液时，若加水超过容量瓶刻度，应用胶头滴管将多余溶液吸出
C. 酸碱滴定时，若加入待测液前用待测液润洗锥形瓶，将导致测定结果偏高
D. 检验某溶液是否含有SO42-时，应取少量该溶液，依次加入BaCl2溶液和稀盐酸

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