【单选题】What is unusual about the members of the band?
A.
They all play trumpets.
B.
They all play modern jazz.
C.
They are all over seventy.
D.
They are all Southerners.
【单选题】“食源性疾病”指食品中致病因素进入人体引起的感染性、中毒性等疾病。以下举措不可用于预防食源性疾病的是( )。
【单选题】Polly enjoys ( )in a band in her free time.
【单选题】What does the title of the passage mean? A.The band wasn’t a famous one. B.The band was formed in a different way. C.The band didn’t play their own music. D.The band wasn’t supported buy his fans.
A.
The band wasn’t a famous one.
B.
The band was formed in a different way.
C.
The band didn’t play their own music.
D.
The band wasn’t supported buy his fans.
【单选题】食源性疾病,指食品中致病因素进入人体引起的感染性、中毒性等疾病,不包括食物中毒。()
【单选题】( )是指食品中致病因素进入人体引起的感染性、中毒性等疾病。
【单选题】下列各项中,讲述活动的活动重点是( )。
【单选题】()指食品中致病因素进入人体引起的感染性、中毒性等疾病。
【单选题】Polly enjoys_________the guitar in a band in her free tirne.
【多选题】下列关于电解质溶液的叙述正确的是 ( )
A.
常温下,NH 4 Cl与某物质的混合溶液pH<7,则其组成可能是NH 4 Cl与HCl或NH 4 Cl与NH 3 ?H 2 O
B.
将pH=5的氢氟酸溶液稀释后,溶液中所有离子的浓度均降低
C.
常温下,同浓度的Na 2 S与NaHS溶液中所含的粒子种类相同
D.
将一元酸HA溶液与一元碱BOH溶液等体积混合,若所得溶液呈酸性,则混合溶液中离子浓度一定满足:c(B + )>c(A - )>c(H + )>c(OH - )