若一幅CT颅脑图像的窗宽和窗位为80和40，那么它显示的CT、值范围为（）. A.0

用所给词的正确形式填空 。

1. How long              he              (read) English every night?

2. I have some              (knife). I can lend one to you.

3. My brother often goes to school without              (eat) breakfast.

4. Before, Kitty seldom               (have) fruit and vegetables.

5. Would you like               (buy) fish？

6. I play computer games              (two) a week.

7. My teacher says it is very important              (sleep) well before an exam (考试).

8. Those              need a lot of time              every day. (dance)

9. The fish is too              (salt). I don't want to eat it.

10. Daniel usually              (have) meat and vegetables for dinner now.

Since the forest has been destroyed by a big fire, a large ______ of trees ______ to be planted on the mountain．

A．number; has

B．amount; has

C．quantity; have

D．sum; have

患者男，49岁，因“腰痛2个月”入院。查体：L₁～L₃椎体破坏，余无明显阳性体征。X线：溶骨性病变；术中冷冻组织活检，镜下几乎未见正常骨质，可见大量片状增生的小淋巴细胞，细胞异型性不明显，组织边缘可见少量体积较大细胞，胞质淡染，核增大，形态略不规则，未见明确坏死灶。

病理诊断考虑为（）。（提示经多处取材和石蜡包埋组织，镜下小淋巴细胞增生，见片状及散在分布的异型细胞团，局部细胞排列成小巢状，巢间有纤细的纤维间隔，细胞体积大，但因组织收缩，细胞周围有空隙，部分细胞胞质淡染，核增大，不规则，核膜尚清。）

A.骨非霍奇金淋巴瘤

B.骨霍奇金淋巴瘤

C.椎体的慢性炎性肉芽肿

D.骨嗜酸性肉芽肿

E.骨转移癌

F.骨Ewing肉瘤/PNET

G.骨结核

法国资产阶级革命有何历史意义？

窄轨铁道轨距在（）处测量

A、轨顶

B、轨头圆弧

C、轨顶下13毫米