在盾构机类型中,属于敞开式的是( )。
A.土压式
B.泥水式
C.机械挖掘式
D.异性盾构机
参考答案:C
下列哪项与夏季热的发病无关:
A.感受暑湿疫毒B.发育营养较差C.病后失调气阴不足D.入夏之后,暑热亢盛E.小儿不耐暑热熏蒸
A. It is not enough to learn a foreign language for three years. B. It requires time and effort to master a foreign language. C. A child can learn a foreign language better if her mother is around. D. A child can learn a foreign language faster than an adult.