低颅压性头痛主要特点是（）。 A.紧缩性或压迫性头痛 B.一侧眼眶周围发作性头痛 C

根据句意和首字母在下列句子空白处填上合适的单词。

1. Broccoli, tomatoes and carrots are v________.

2. I have hamburgers for b________.

3. Peter likes ________ (play) basketball.

4. She doesn't like junk food she eats h________ food every day.

5. I have an ice c________, but I don't like French f________.

6. Zhou Jielun is a singing s________.

7. The little girl likes ________(strawberry) a lot.

8. They like ________(eat) hamburgers and carrots for lunch.

9. Chicken ________(be) very delicious.

10. I usually have some ________(tomato) in the basket.

接触系统的凝血因子是指（）

A.因子Ⅱ、Ⅶ、Ⅸ、Ⅹ

B.因子Ⅻ、Ⅺ、PK、HMWK

C.因子Ⅷ、Ⅸ、PK、HMWK

D.因子Ⅱ、Ⅴ、Ⅶ、Ⅹ

E.因子PK

She got stuck in a terrible traffic jam on the highway to Shanghai, or she     dinner with her family now.

A．will be having

B．would be having

C．is having

D．was having

钢筋混凝土框架结构柱的混凝土强度等级为C50，处于室内正常环境，其纵向受力钢筋的混凝土保护层厚度不应小于钢筋直径，且不应小于下列哪一个数值______

A．20mm
B．28mm
C．30mm
D．32mm

生态危机