【单选题】We have an annealed carbon steel which has hardness of 150HBS. Suppose we know the hardness of Pearlite is 200HBS and the hardness of Ferrite is 80HBS, determine the carbon amount of this steel.
【单选题】以下哪种情况不是脊髓灰质炎糖丸疫苗的禁忌证
【单选题】What does the man say about the criticism of technology?
A.
He should ignore the criticism.
B.
We need to consider what technology may bring us.
C.
He feels bad about the criticism.
D.
He thinks the criticism is far-fetched.
【单选题】某儿童出生于2001年1月15日。 下列不属于服用脊髓灰质炎糖丸疫苗禁忌证的是