题目内容

The three most common types of cancer treatment are surgery, radiotherapy and chemotherapy,aim at removing the cancer cells or destroying them in the body with medicines or other agents.

A. which
B. what
C. who
D. that

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铁路信号分为视觉信号和（）两大类。

柴油机正常工作时,滑动轴承的轴颈与轴瓦之间应处于()状态。

A.液体摩擦
B.干摩擦
C.边界
D.半干摩擦

Choice of treatment is influenced by several factors, including the specific characteristics of the cancer, the patient’s overall condition, andthe goal of treatment is to cure the cancer, keep it from spreading, or relieve the symptoms.

A. which
B. what
C. that
D. whether

四冲程柴油机的气门重叠角是在()止点附近。

A.上
B.下
C.中
D.上、下