已知主、俯视图，如图A-10所示，左视图正确的是（）图。 A、AB、BC、CD、D

“物必先腐，而后虫生”所体现的哲理是________。

A．必然性与偶然性的辩证关系

B．内因与外因的辩证关系

C．可能性与现实性的辩证关系

D．现象与本质的辩证关系

—We all had a lot of fun at the barbecue yesterday. Pity you weren't there.

—I really should have gone with you but I________on some remaining problems.

A．worked

B．was working

C．would work

D．would have worked

Although the causes of cancer ____we do not yet have any practical way to prevent it.

A．are being uncovered

B．have been uncovering

C．are uncovering

D．have uncovered

回忆课文内容填空。

1．天都峰是闻名中外的山的________主峰之一。《爬天都峰》一文中描述了天都峰________的特点。

2．《金色的草地》一文中，“我”家窗前的草地在________________的时候，就变成金色的了；当蒲公英的花朵合拢时，草地就变成________色的了。

女性，45岁。反复上腹痛20年，近1周出现频繁呕吐，呕吐量大，呕吐物为宿食，不含胆汁。查体：可见胃型，振水音阳性。最可能的诊断是

A．十二指肠憩室

B．幽门梗阻

C．十二指肠梗阻

D．小肠梗阻

E．食管裂孔疝