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问题 问答题 简答题

简述主要蔬菜作物（如甘蓝、番茄、茄子、甜椒、黄瓜、西葫芦等）春季育苗适宜的苗龄，并说明原因。

答案

参考答案：

番茄50-60d甘蓝55-60d茄子60-70d甜椒60-70d黄瓜35-40d西葫芦20-25d

填空题

用所给词的适当形式填空。

1. The       (invent) of a space rocket took many years.

2. We must improve the       (able) of speaking English greatly.

3. We should lay the        (found) for our joy in the future.

4. For         (century) this has been their custom.

5. Learning English well must have        (science) ways.

6. She decided that she taught        (she) Japanese.

7. The little boy looked         (curious) at the tall young man.
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单项选择题

根据《压力容器安全技术监察规程》的分类规定，以下属于二类容器的有( )。

A．搪玻璃压力容器

B．低压管壳式余热锅炉

C．非易燃或无毒介质的低压容器

D．易燃或有毒介质的低压反应器外壳或储罐
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