常见的 * * 炎症不包括()
A.细菌性 * * 炎
B.老年性 * * 炎
C.真菌性 * * 炎
D.滴虫性 * * 炎
E.阿米巴性 * * 炎
参考答案:E
-Your hometown has changed a lot.
-Yes. Take a look at these tall buildings. They _____ last year. [ ]
A. build
B. were built
C. built
D. was built
方程y"=1+y’2的通解为()。
A.y=cos(x+c1)+c2
B.y=sin(x+c1)+c2
C.y=-In|cos(x+c1)|+c2
D.y=-In|sin(x+c1)|+c2