要设置一段文字为黑体字，第一步该( )

如果将抛物线y=x²向左平移4个单位，再向下平移2个单位后，那么此时抛物线的表达式是______．

《刑法》规定，以牟利为目的，违反土地管理法规，非法转让、倒卖土地使用权，情节严重的，处以（）年以下有期徒刑或者拘役，并处罚金。

A.1

B.3

C.5

D.7

硫脲类、咪唑类抗甲状腺药物的主要不良反应是（）

A.粒细胞减少

B.全血细胞减少

C.血红蛋白降低

D.肾功能受损

E.药疹

Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.

Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them, without a radio receiver. Similarly, we can’t sense radio activity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.

At very high levels, radiation can kill an animal or human being outright by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit. And if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.

This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can he irradiated and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.

Radiation can hurt us. We must know the truth.

Radiation can cause serious consequences at the lowest level（）

A. when it kills few cells

B. if it damages the few cells

C. though the damaged cells can repair themselves

D. unless the damaged cells can reproduce themselves

以下哪组检查适用于肱二头肌长头肌腱腱鞘炎的诊断（）

A.杜加试验，内旋试验

B.内旋试验，肱二头肌抗阻试验

C.杜加试验，肱二头肌抗阻试验

D.杜加试验，肩部撞击试验

E.杜加试验，肩关节碘剂造影