简述实质细胞变性和间质变性。

根据提示或句意，补全句子。

1. I like s___________ best. It's warm.

2. W___________ is cold, but I like it.

3. I often go ___________ (swim) with Jack.

4. What's ___________ (you) favourite season?

5. ___________ season do you like best?

6. I can ___________ (make) a snowman.

7. I eat breakfast ___________ 7: 30.

8. I eat ___________ at 8: 00 in the evening.

They _____ very busy last month.　 [ ]

A. are

B. were

C. be

D. have been

制备FeSO₄最适宜的方法是（   ）

A．过量的铁与稀硫酸反应

B．FeO与稀H₂SO₄反应

C．FeCO₃与稀H₂SO₄反应

D．Fe(OH)₂与稀H₂SO₄反应

下列哪项不符合窒息时血液生化和代谢的改变

A．高钙血症

B．混合性酸中毒

C．低钠血症

D．低血糖

E．高胆红素血症

C₇₀型敞车车门与搭接件的搭接量有哪些要求？