压力容器运行中应该注意控制（）。A、使用压力 B、使用温度 C、介质

How many things can you see in the night sky? A lot!      a clear evening you might see the Moon and some planets. And thousands of sparkling stars     , too.

You can see even      with a telescope. You might see stars where you only saw dark space before. You might see that many stars look larger than others. You might see that some stars      look white are really red or blue.

But scientists believe there are some things in the sky that we               . We can’t see them with the biggest telescope in the world, even when it is the clearest night of the year. That’s         they’re invisible. They’re the mysterious dead stars called black holes. You might find          hard to imagine that stars die. After all, our Sun is a star. Year after year we see it up in the sky, burning brightly, giving us heat and light. The Sun certainly doesn’t seem          getting old or weak. But stars do burn out and die after billions of years. As a star’s gases burn, they give off light and heat. But when the gas runs        , the star stops burning and begins to die.

So the next time you stare up at the night sky, remember: there’s more in the sky than that meets the eye.        amazing space it is!

对于出让金的支付方式，《城镇国有土地使用权出让和转让暂行条例》第十四条规定了一次性交付的方式，土地使用者应当在签订土地使用权出让合同后( )日内支付全部土地使用权出让金。

A．15

B．30

C．45

D．60

慢性唇炎的病因是

A．舔唇不良习惯

B．病灶感染

C．感冒

D．消化不良

E．寄生虫感染

味觉的敏感度往往受食物或其他刺激物的温度影响，味觉的敏感性最高时的温度是：（）

A．20～25℃

B．25～30℃

C．20～30℃

D．25～35℃

对（）的精神病人，公安机关的人民警察可以采取保护性约束措施。

A、一般

B、流落街头

C、严重危害公共安全

D、严重危害他人人身安全