毛果芸香碱可用于治疗 A．尿潴留 B．青光眼 C．虹膜睫状体炎 D．阿托品中毒 E．

A child withdraws from his piggy bank 10% of the original sum in the bank. If he must add 90￠ to bring the amount in the bank back up to the original sum, what was the original sum in the bank ？（）

A.$1.00

B.$1.90

C.$8.10

D.$9.00

E.$9.90

Which of the following tests are NOT used to examine the weak form of the efficient market hypothesis Those that examine:（）

A. whether security returns are independent over time.

B. a security’s return relative to the market return.

C. whether excess returns can be obtained from using mechanical trading rules.

如图所示，将同样的纸，折成不同形状的纸飞机，用同样的手法抛出去，纸飞机飞的距离不一样。此事实说明，影响纸飞机飞行距离的因素是

A.制作材料

B.飞机形状

C.飞行技巧

D.飞行高度

议会督察专员制度起源于（）

A.芬兰

B.瑞典

C.挪威

D.丹麦

与非自然环境相比，自然环境具有以下特点：柔和、（）、浑然一体和不确定，刺激强度有（）的变化范围。