副交感神经兴奋的表现是( )。A．心跳加快加强 B．支气管平滑肌舒张 C．胃肠运动

在“成绩”表中，检索选修4门以上课程的男生的姓名和平均成绩。“成绩”表中包含学号、姓名、课程名称和成绩4个字段。请将下面的SQ[。语句补充完整。
SELECT 姓名, AVG(成绩) AS 平均成绩 FROM 成绩；
WHERE 性别="男";
GROUPBY 学号;
______COUNT(*)＞=4

当制动轮直径≤200mm时，其径向跳动不应大于（），当制动轮直径>200mm时，其径向跳动不应大于（）。

Rose, Daisy and Petunia are the directors of Bloomwell Sdn Bhd, a company which specialises in the cultivation and sale of plants and flowers. They are also equal shareholders in the company. Two months ago, a quarrel broke out between Petunia and the other directors and since then, Petunia has refused to co-operate with Rose and Daisy on most company matters. Rose and Daisy, in an effort to dilute Petunia’s voting power and prevent her from vetoing special resolutions intend to take the following courses of action:(i) Issue a substantial amount of new shares to Tulip, a close friend of Rose and Daisy; and(ii) Make the company provide a fixed charge on its land as security to Bank Senang Pinjam, which is prepared to give a loan to Tulip to finance the subscription of the shares.Required:Advise Petunia whether there are any grounds on which the validity of the proposed courses of action may be challenged. (10 marks)

2月3日，刘某因扰乱公共秩序，被县公安局处以拘留10日的行政处罚。刘某不服提起行政复议。复议机关以刘某复议申请已过复议期限为由决定不予受理。对该不予受理的决定，刘某可通过以下哪种途径寻求救济？（）

A.作出拘留决定前，县公安局应为刘某举行听证

B.复议机关为市公安局

C.对不予受理刘某可以直接向市人民政府提起行政复议

D.对不予受理决定，刘某可以向法院提起行政诉讼

莫尔法测定氯离子含量时，溶液的pH＜5，则会造成正误差。( )