出现链霉素过敏反应时,使用葡萄糖酸钙的目的是()
A.收缩血管,增加外周阻力
B.松弛支气管平滑肌
C.使毒性症状减轻
D.兴奋呼吸中枢
E.缓解皮肤瘙痒
参考答案:C
函数f(x)=x3+ax2+bx+a2,在x=1时有极值10,那么a,b的值分别为______.
根据下列句子所给汉语意思或提示,写出空缺处单词的正确形式。
小题1:Scientists are ________ (调查) into the cause of cancer.
小题2:To get the job done, one should be ________(精力充沛) and hardworking.
小题3:As a ______(奖赏)for passing her exams, she got a new bike from her parents.
小题4:Dilma Rousseff, who won 56% of the _______ (选票), was elected President of Brazil.
小题5:The old lady likes (spy) into other people’s affairs.