钙处理钻井液的组成特点是体系中同时含有一定浓度的钙离子和()。
参考答案:分散剂
A draft regulation on school bus safety management was made public by the State Council, with the public________to give comments.
A.to invite
B.inviting
C.invited
D.having invited
内脏运动神经包括()
A.迷走神经
B.交感神经
C.副交感神经
D.躯体神经
E.动眼神经