The argument in the passage leads most naturally to which of the following conclusions
A low output of urinary kallikrein is a likely cause of high blood pressure in children.
B. The kallikrein-kinin system plays an important role in the regulation of blood pressure.
C. Essential hypertension may have biochemical precursors which may be useful predictors in children.
D. The failure of the body to produce sufficient amounts of kinins is the cause of essential hypertension.
查看答案
人体内O2、CO2进出细胞膜是通过
A. 单纯扩散
B. 易化扩散
C. 主动转运
D. 入胞作用
E. 出胞作用
Which of the following can be inferred about the viewpoint expressed in the second paragraph of the passage
A. It is a reinterpretation of slave life based on new research done by Afro-American scholars.
B. It is based entirely on recently published descriptions of slave life written by slaves themselves.
C. It is biased and orderly sympathetic to the views of white, colonial slaveholders.
D. It is highly speculative and supported by little actual historical evidenc
The evidence that a child with blood pressure higher or lower than the norm would tend to retain the same blood pressure pattern with increasing age is introduced by the author in order to______.
A. suggest that essential hypertension may have biochemical causes
B. show that high blood pressure can be detected in children under the age of 15
C. provide evidence that factors affecting blood pressure are already present in children
D. propose that increased screening of children for high blood pressure should be undertaken
认识活动的最基本的心理过程是
A. 感觉
B. 思维
C. 情感
D. 知觉
E. 意志
微信支付 
支付宝支付