连线。
①Can your father play football? ____ A. Yes, she can.
②Can she ride a bike? ____ B. Here you are.
③Here's a card for you. Happy Teachers' Day! ____ C. No, he can't.
④Give me a balloon, please. ____ D. Thank you.
请找出下列图示中正确的实验操作（ ）
— What a sunny day!
— Yes. You'd better take a sun umbrella to protect yourself _______ the sunshine.
某家庭4个成员中，父亲的红细胞能被其妻、女、子的血清凝集；母亲的红细胞只能被其夫、女的血清凝集；姐姐的红细胞不能被父、母、弟的血清凝集；弟弟的红细胞只能被父、姐的血清凝集。已知弟弟的红细胞膜上不含A凝集原，推测其父亲的血型是（ ）
反复加热，会导致水中的溶解氧越来越少。你认为长期饮用这种水，是否会导致人体缺氧？请作出判断并说明理由。____。
