【单选题】In contrast to traditional analyses of minority business, the sociological analysis contends that minority business ownership is a group-level phenomenon, in that it is largely dependent upon socialgr...
A.
They were developed exclusively by Chinese immigrants.
B.
They accounted for a significant portion of the investment capital used by Chinese immigrants in blew York in the early twentieth century.
C.
Third- generation members of an immigrant group who started businesses in the 1920's would have been unlikely to rely on them.
D.
Recent immigrants still frequently turn to rotating credit associations instead of banks for investment capital.
【简答题】是乳糖不耐症的原因是一部分人随着年龄增长,消化道内缺乏____而不能分解和吸收____,饮用牛乳后会出现呕吐、腹胀、腹泻等不适应症。当____活性低或缺乏时,____在肠道内不分解而直接进入大肠,使大肠渗透压增高,导致水分进入肠道管腔内,大肠中细菌繁殖,产生乳酸和CO2,至pH下降,当pH<6.5时刺激大肠,引起腹痛、腹泻。< /div>
【单选题】乳糖不耐症是牛奶中的天然乳糖对部分人群产生毒害作用的现象,这种中毒原因属于
【多选题】有关乳糖不耐症,说法正确的有
A.
出现此症状的原因是,饮用乳品者体内的乳糖酶活性不足或缺乏
D.
乳品中的乳糖被肠道菌群利用后所产生的的气体和其他成分造成了腹胀、腹泻
【单选题】William realized that he should have felt _______ with his job, but he didn’t
【判断题】盒模型 box-sizing:content-box ,则 该盒子的 宽度 width=conten
【判断题】Conten t-Based Instruction better reflects learners ’ needs for learning a second language.
【单选题】He was always _______ for knowledge, and at last became an expert in the field of art.
【单选题】一些人食用了一些食物后确实产生不良反应的原因可能是: