下列属于省力杠杆的是[ ]
A.
B.
C.
D.
答案:B
_____ that we all went out, lying in the sun.
A.So fine was the weather
B.So was the fine weather
C.The weather was so fine was
D.So the weather was tine
柏油样便见于()
A.上消化道出血
B.阿米巴痢疾
C.痔或肛裂
D.急性细菌性痢疾
E.急性出血性坏死性肠炎