下列说法正确的是（  ）

A：“为真”是“为真”的充分不必要条件；

B：已知随机变量，且，则；

C：若，则不等式成立的概率是5. but now pandas are in great danger, so we must 6 them.

    Now, I'm watching the two pandas in the zoo. I  7  want to go near and play with them. 8  I also want to give them some food. But  9 the rules in the zoo:

          1. Don't go near tothe animals.

          2. Don't give10 to the animals.

    To make animals live a happy life, everyone needs to follow the rules.