根据短文内容，判断句子正(T)误(F)。

     In our city there is a big zoo. There are many animals in it. There are some beautiful tigers and lions.

They eat much meat every day. 

     There  are  also two big  elephants  and a baby one. Children like to ride on them. The elephants are

kind. They eat much grass and many bananas. Elephants like bananas very  much. In the zoo  there  are

also brown (棕色的) bears, black bears and white bears. They are all slow and clumsy (笨拙的). They

stand on their back legs and lift (抬起) their front legs to ask for food. They like cakes very much.

( )1. Tigers and lions like to eat grass and bananas.

(     )2. There are three elephants in the zoo.

( )3. Children like to ride the elephants in the zoo.

( )4. The elephants are all slow and clumsy.

( )5. The bears always ask for food with their back legs.

一食入过多白果(含氰化物)的病人，导致细胞窒息，抑制呼吸链的具体环节是

A．阻断Cytaa3把电子传递给氧
B．解偶联作用
C．抑制ATP合酶的活性
D．阻断Cytb和c1传递电子
E．阻断NADH脱氢酶的催化作用