电控气动风阀的优点是()。
A.气缸加工精度高
B.无极调节跳汰频率
C.适应能力强
D.自动调节
参考答案:B, C, D
They believed, and ___did we, that these modern paintings collected in the Shanghai Art Gallery were as valuable as those in the Museum.
A.that
B.which
C.neither
D.so
提示左心室衰竭的是()
A.奇脉
B.迟脉
C.无脉
D.交替脉
E.水冲脉