患者，女，每逢经前2天起头痛，巅顶尤剧，或伴头晕目眩，烦躁易怒，口苦咽干。诊断为A．

甲乙双方订立买卖合同，约定收货后一周内付款。甲方在交货前发现乙方经营状况严重恶化，根据合同法律制度的规定，甲方可以（）。

A.行使同时履行抗辩权

B.行使先履行抗辩权

C.行使不安抗辩权

D.解除合同

I was caught in a traffic jam for over an hour, otherwise I ________ you waiting for such a long time.

A．will not keep

B．have not kept

C．had not kept

D．would not have kept

下列哪项属于结膜充血的描述（）

A.充血颜色紫红（暗红）

B.显著部位近角膜缘

C.血管形态微细直行，隐约呈毛刷状

D.推动结膜，血管随之移动

E.常见于角膜炎、虹膜炎、巩膜炎、青光眼

Vega research has been conducting investor polls for Third State Bank. They have found the most investors are not willing to tie up their money in a 1-year (2-year) CD unless they receive at least 1.0% (1.5%) more than they would on an ordinary savings account. If the savings account rate is 3%, and the bank wants to raise funds with 2-year CDs, the yield must be at least:（）

A. 4.0%, and this represents a required rate of return.

B. 4.5%, and this represents a discount rate.

C. 4.5%, and this represents a required rate of return.

子宫脱垂是指子宫从正常位置沿 * * 下降至（）

A．子宫颈外口脱出于 * * 口外

B．子宫体完全脱出于 * * 口外

C．子宫颈及子宫体全部脱出于 * * 口外

D．子宫颈外口达坐骨棘水平面以下，甚至子宫全部脱出于 * * 口外

E．子宫颈内口达 * * 口，子宫体脱出 * * 口外