妊娠常脉通常在女子怀孕几周后易见()
A.以上均不对
B.8周
C.4周
D.12周
E.6周
参考答案:E
小浩同学在整理“家庭化学日志”,请你帮助他完成:
(1)紫卷心菜的汁液有类似紫色石蕊试液的作用!将紫卷心菜汁滴入食醋中,可显出______色,证明食醋的pH______7(选填>、<或=).
(2)桌上摆放的竹炭雕屏可以起到静化室内空气的作用,这是因为竹炭具有______性.
(3)妈妈给盆花施用了碳酸氢铵(NH4HCO3),这是一种______(选填氮肥,或磷肥,或复合肥),它属于______(选填酸、碱、盐或氧化物).
—A talk on Chinese history ________ in our school next Tuesday. Are you interested in it?
— Sounds good. Do we need to buy tickets?
A.be given
B.has been given
C.will be given
D.will give