He often makes his sister , and this time he is made by his sister. A: cry…cry B: to cry…to cry C: to cry…cry D: cry…to cry

Tom often makes his sister _______, but yesterday he was made ______ by his sister. A: cry; to cry B: to cry; cry C: cry; cry D: to cry; to cry

In the past he often made his sister ____, but now he is often made _____ by his sister. A: to cry, to cry B: cry, cry C: to cry, cry D: cry, to cry

反应 aA + bB === P,若cA,0/cB,0=a/b，则任意时候都有cA/cB=a/b。

下列群体中哪一个处于遗传平衡状态（） A: 16%AA:48%Aa:36%aa B: 49%AA:21%Aa:9%aa C: 4%AA:16%Aa:16%aa D: 20%AA:40%Aa:40%aa

8、在△ABC中，若AB=9，BC=6，则第三边CA的长度的取值范围是（　　）A、3＜CA＜9B、6＜CA＜9C、9＜CA＜15D、3＜CA＜15

Which of the following items belongs to balanced population? A: AA 49%; Aa 42%; aa9% B: AA 49%; Aa 26%; aa25% C: AA 25%; Aa 39%; aa36% D: AA 9%; Aa 66%; aa25% E: AA 16% ;Aa 36% ; aa48%

Though Tommy often makes her little sister _____, today he was made _____by her little sister. A: cry, to cry B: cry, cry C: to cry, to cry D: to cry, crying

中国国际、中国南方、中国东方、中华航空的代码是： A: CA，CZ，MU，AA B: CA，CZ，MU，CI C: CA，LH，MU，CI D: CA，CZ，MU，BA

​由基因频率和基因型频率推测，以下哪个群体不属于平衡群体？‌ A: AA(20%); Aa(60%); aa(20%) B: AA(81%); Aa(18%); aa(1%) C: AA(64%); Aa(32%); aa(4%) D: AA(49%); Aa(42%); aa(9%)