腰痛以腰脊两侧为重者,所属经脉病证是()。腰痛以腰脊中部为重者,所属经脉病证是()。
A.督脉
B.阴跷脉
C.阳跷脉
D.足少阳经
E.足太阳经
参考答案:E,A
用括号内所给单词的适当形式填空。
1. Almost all the________ (emperor) wanted to live longer, so they tried many ways.
2. Where do you live, the inner part or the________ (out) part of the city?
3.I felt________ (surprise) to see the classroom was empty when I came in.
4. The Forbidden City is the ________ (large) palace in the world.
5. Why is the Chongyang Festival ________ (call) the Old Men's Day?
关于机械效率,下列说法中正确的是: [ ]
A.机械做功越快,机械效率越高
B.机械所做的总功越少,机械效率越高
C.机械做的有用功在总功中占的百分比越大,机械效率越高
D.使用机械时,所用动力跟物重的比值越小,机械效率越高