A:does he even given
B:he even gives
C:will he even give
D:he will even given
“骑在羊背上”和“坐在矿车上”的国家是( )
写出一个比﹣2小的数是 ____
“SARS”病毒的遗传物质中含有核苷酸的种类及碱基的种类分别是( )