Questions 19 to 21 are based on the passage you have just heard.19. A: The function of the human immune system. B: The cause of various auto-immune diseases. C: The viruses that may infect the human immune system. D: The change in people’s immune system as they get older.

Which one is NOT an auto immune disease A: Diabetes. B: Rheumatoid arthritis. C: Ulcerative colitis. D: Manic-depression.

14. One of the features of auto-immune diseases is that they ________ within individuals and sometimes within an individual's family.

immune

The immune system is compared to a library.

Which<br/>is correct about peripheral immune organ () A: It<br/>is also called secondary immune organ B: It<br/>is the place where NK cell located C: It<br/>is the place where RBC located D: It<br/>is the place where immune response located E: It<br/>includes spleen. liver and mucosal immune system

下列代码正确的是? decltype;(auto);x;|auto;a;{10}; decltype(a);y;|auto array[] {1.0, 2.0};|auto;f();{ ;;return;auto; }

Animals are proved amoral and immune to pain.

Auto CAD2010 属于下面哪一个版本系列（ ） A: Auto CAD R17 B: Auto CAD R18 C: Auto CAD R19 D: Auto CAD R20

下列代码正确的是 A: auto a {10}; decltype(a) y; B: decltype (auto) x; C: auto f() { return auto; } D: auto array[] {1.0, 2.0};