下列有关聚乙烯的说法正确的是( )
| A．聚乙烯是通过加聚反应生成的 |
| B．聚乙烯具有固定的元素组成，因而具有固定的熔、沸点 |
| C．聚乙烯塑料袋因有毒，不可以装食品 |
| D．聚乙烯因性质稳定，故不易造成污染 |
相关试题
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
I can’t leave. She told me that I ______ stay here until she comes back.
| A．can | B．must | C．will | D．may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A．Go ahead | B．Yes, my pleasure |
C．Yes, I do | D．Come on |
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