关键零部件的尺寸，应反复测量（），求平均值。A.2次 B.3次 C.4次 D.若干次

患者咳痰清稀，微恶风寒，发热喉痒，鼻塞涕清，苔薄白，脉浮紧，宜诊为（）

A.风寒表证

B.太阳中风证

C.风寒犯肺证

D.寒痰阻肺证

E.风水相搏证

把一刚摘下的果树枝装在小瓶中，如下图所示，用弹簧秤测得重为5牛，光照6小时后，测得重为4.8牛。其重减少的主要原因是

A．蒸腾作用

B．运输作用

C．呼吸作用

D．光合作用

ERG的b波起源于

A．无长突细胞

B．XZ极细胞

C．神经节细胞

D．视杆细胞

E．视神经

实验室中有一瓶久置的白色粉末，元素分析证明它是由钾、硫、氧三种元素组成，钾和硫的质量比为39：16，下列结论正确的是（　　）

A．根据元素分析结果推测该粉末为纯净物

B．将粉末溶于水，加入氯化钡，观察到有白色沉淀生成，证明原粉末是硫酸钾

C．将粉末加入盐酸中，产生气泡，证明原粉末是亚硫酸钾

D．将粉末溶于水，加入氯化钡和盐酸，观察到有白色沉淀和气泡生成，证明原粉末是硫酸钾和亚硫酸钾的混合物

Selected information from Caledonia, Inc.’s financial activities in the year 2006 was as follows: Net Income was $ 460000. 2300000 shares of common stock were outstanding on January 1. The average market price per share was $ 2 and the year-end stock price was $1.50. 1000 shares of 8 percent, $1000 par value preferred shares were outstanding on January 1. Dividends were paid in 2006. 10000 warrants, each of which allows the holder to purchase 100 shares of common stock at an exercise price of $1.50 per common share, were outstanding the entire year. Caledonia’s Diluted earnings per share (Diluted EPS) for 2006 was closest to:

A．

B．

C．