在传染病的发生、发展和最终结局中,决定因素都在于病原体的强弱。
查看答案
细菌的外毒素的毒性比内毒素更强,抗热性和耐热性也更强。
A. 对
B. 错
会引起温血动物和人体发烧的热源质,就是革兰氏阴性细菌所释放的内毒素。
A. 对
B. 错
Which of the following coins is the picture of the Prince of Wales feathers engraved on? ( )
A. 1pcoins.
B. 2pcoins.
C. 5pcoins.
D. 10pcoins.
WhichofthefollowingisNOTtrueabout2-poundcoin?()
A. Itisthebiggestone.
B. Itistheheaviestone.
C. Ithastwocolors.
D. Itonlyhasonedesign.