小肠细胞膜的吸取中被动转运是（）.
A.被动扩散
B.易化扩散
C.渗透
D.滤过作用
参考答案：A, B, C, D
一个三角形的三条边长分别是4厘米、6厘米、4厘米，这个三角形的周长是______厘米．
China Daily was first released in 1981 and its European Weekly started in 2010, which is____ in nearly 30 countries in Europe and prints around 100000 copies.
A．relevant
B． contemporary
C．controversial
D．available
