水果发生苦痘病是因为缺乏锌元素造成的。

依次填入下面一段文字中横线处的语句，与上下文衔接最恰当的一组是 （   ）

（1）桐庐街道虽小，却并无狭窄之感，    ，这似乎是别的小城市中所不常见的。

（2）我住在楼上，窗子又正对着风口，每当狂风大作，     ，常令我夜不能寐。

①街树疏疏地种在道旁                  ②道旁疏疏地种着街树

③屋瓦齐鸣，龙吟虎啸                  ④龙吟虎啸，屋瓦齐鸣

A．①③

B．②④

C．①④

D．②③

一台拖拉机耕一亩地需要消耗柴油0.85kg，该拖拉机油箱的容积是200L，柴油的密度是0.85×10³kg/m³，油箱装满油后，最多可耕地的亩数为______亩．

10月1日18时59分57秒，长征三号丙火箭在我国西昌卫星发射中心点火发射，把“       ”卫星成功送入太空。这标志着探月工程二期任务迈出了成功的第一步。

A．嫦娥一号

B．嫦娥二号

C．探月一号

D．探月二号

使用超声波探伤仪对钻具进行探伤时应注意哪些事项？

Audrey is a Chinese-American student. She has found many value(价值观) differences between Chinese and Americans.
About money
1) Americans would like to spend more than they have, so many of them are always in debt (欠债). Chinese usually spend less than they have, so many of them always have money left in the bank.
2) American kids love to make money by themselves. Chinese kids always ask their parents for money.
3) American parents think it is not useful to send their children to an expensive university. Chinese parents would do anything to send their children to good universities and that might make them very poor sometimes.
About school
1) Many American girls take part in sports, dancing and singing groups while Chinese girls take part in academic groups.
2) Some American students think that "B" is a gift while Chinese students think that "B" is terrible.
American parents and Chinese parents
American parents allow their daughters or sons to go out to have some part-time jobs in their free time or at the weekends. Chinese parents usually don’t allow their children to do so in middle or high schools.

Some Chinese people have money left in the bank because ______.

A．they usually spend less than they have

B．they spend more than they have

C．they don’t like spending money at all

D．they make a lot of money