观察人血涂片时，最容易看到的血细胞是白细胞。（判断对错）

胰岛素和性激素都是生物激素，它们的化学本质分别是（    ）

下列有关文学常识及课文内容的表述，有错误的一项是（     ）

已知方程$\frac{\left|\sin x\right|}{x}=k$在$\left(0,+\infty \right)$上有两个不同的解$\alpha ,\beta \left(\alpha <\beta \right)$，则下列结论正确的是（   ）

    I had worked that day, as a nurse. Now I faced the dirty supper dishes. I wanted to 1why Jimmy hadn't phoned as usual to say “Good night”to Bob and Tom. “Maybe Daddy's 2 working on an accident,” I said to Bob. “Go to3 now. You'll see him in the morning.”Soon there was a knock at the door. “There4 be something wrong with your phone,” my neighbor told me. “The City Police Station wants you to 5.”
    I went into the living room and dialed. Then I 6 the words every police wife fears (害怕): “Your husband has been hurt.” When I reached the hospital, my heart sank (下沉). The entrance was jammed with TV-news trucks. In the 7  I saw Jimmy’s best friend, Smith. “Just tell me -is he alive ?” I asked.
    Smith 8. and didn't answer. Then I found my younger sister, Mandy. “He’9s ”she told me, and we began to cry together.
Later, Smith told me 10 had happened.
    In the morning, when my little Bob asked, “Where's Daddy?” I 11  him into my arms and tried to explain. “A bad man 12 Daddy last night.” I said. “Daddy can't come home any more. He's in heaven(天堂) now.”
My son looked at me, his blue eyes 13 the picture of trust(相信). “Do they have14 in heaven ?”he asked. “Can I call him ?”
“No, Bob, Daddy still loves you, but Daddy can't15”.