()是指两脚前后交叉的舞步。
参考答案:锁步
—Alice, why didn’t you come yesterday? —I ___, but I had an unexpected visitor.
A.had
B.would
C.was going to
D.did
下列微生物中,属于 * * 正常菌群的有()。
A.乳杆菌
B.加德纳菌
C.消化链球菌
D.支原体
E.假丝酵母菌