操舵装置液压控制系统受动器中的曲拐杠杆()。
A.推动舵机舵柄
B.直接转动舵叶
C.控制液压舵机的变量泵工作
D.控制液压舵机电力开关工作
参考答案:C
慢粒白血病下列错误的是()
A.中性粒细胞碱性磷酸酶慢性期增多,急性期下降
B.骨髓中原始细胞<10%,而以中晚幼粒细胞为主
C.晚期骨髓内纤维组织增多
D.周围血中中性粒细胞百分数增多
E.血清维生素B12浓度增高
根据句意及首字母提示补全单词(5分)
小题1:The naughty girl d ________ the chair badly yesterday.
小题2:Please k______ at the door before you come into the teachers’ room.
小题3:They s________ in the Pacific Ocean, it was great.
小题4:There is a science m________ near our school . We often visit it.
小题5:Yang Liwei landed s________ after 21 hours.