单项选择题
What are symptom(s) of a ruptured appendix?（）
A.Dilated pupils and shallow breathing B.Diarrhea and frequent urination C.Muscle tenseness in almost the entire abdomen D.Extreme sweating and reddening skin
单项选择题 We have no steel wire．You had better（）us one.
单项选择题 Tripping defects in anchors frequently occur in（）.
单项选择题 To reduce mild fever the MOST useful drug is（）.
