加入氢氧化钠是为了()。
(A)除去溶解氧
(B)除残硬
(C)调节pH值
(D)A、B、C均错
参考答案:C
根据图画填空白,每空一词。
1. — Hello, Mike. you play football?
—No, I can’t. But I can .
2. —Can the girl the piano?
—Yes, she . She is a music teacher.
3. — What your father’s job?
—He is a at a hospital in Lanzhu.
4. —Can you speak ?
—Sure, but I speak English.
5. —What is your favourite ?
—My favourite is tennis.
船舶所有权的取得、转让和消灭,未经船舶登记机关登记的,______。
A.可以对抗第三人 B.该行为受法律保护C.不得对抗第三人 D.该行为对当事人具有法律约束力