各滤油器及油箱顶部加油口内的滤网，（）应当拆检，认真清洗，严防污物堵塞。A、每次上井

Stanley Crux, CFA, a portfolio manager at NWS Asset Management Ltd, calls a friend to join him for dinner. The friend, a financial analyst at D&M Corporation declines the invitation and explains that she is performing due diligence on Orca Electronics, a company that D&M is about to acquire. After the phone call, Crux searches the Internet for any news of the acquisition but finds nothing. Upon verifying that Orca is on NWS’s approved stock list, Crux purchases Orca’s common stock and call options for the NWS clients. Two weeks later, D＆M announces its intention to acquire Orca. The next day, Crux sells all of the Orca securities, giving the fund a profit of $ 3 million. According to the Standards of Practice Handbook, did Crux violate any CFA Institute Standards of Professional Conduct（）

A. No.

B. Yes, because he traded on material nonpublic information.

C. Yes, because he only purchased stock and options for selective clients, not all clients.

海关对某经营加工贸易的企业进行稽查时发现，该企业一年内偷逃应缴税费累计达 48万元人民币，按照《中华人民共和国海关对企业实施分类管理办法》的规定，该企业应属于B类企业。 ( )

如果要在程序代码中为图片框动态加载或清除图形，可以通过( )函数来实现。

A．InputBox

B．Input

C．LoadPicture

D．PaintPicture

牵牛花的花色由基因R和r控制，叶的形态由基因H和h控制。下表是3组不同亲本的杂交及结果，请分析回答：

根据第（）组合可判断阔叶对窄叶最可能为显性；第（）组合可判断（）（花色）为显性。

某筏形基础底面尺寸为10m×20m，底面压力为220kPa，基础底面下设300mm褥垫层，基础埋深2.0m，勘察资料如下：
①0～10m，淤泥质土，γ=19.5kN/m³，q_sk=7kPa，f_ak=80kPa；E_s=8.8MPa；
②10～20m，砂土，γ=18.5kN/m³，q_sk=25kPa，f_ak=200kPa；
③地下水埋深2.0m。
采用深层搅拌法处理，桩按三角形布置，桩径为500mm，桩长9m，水泥掺入比为15%，桩体平均强度f_cu=2.8MPa，桩间土承载力折减系数为0.4，桩端天然地基土承载力折减系数0.5，桩身强度折减系数为0.33，按《建筑地基处理技术规范》计算。

桩数宜为( )根。

A. 180
B. 191
C. 202
D. 213