尿17-OHCS水平可以反映()。 A.肾上腺皮质功能 B.肾上腺髓质功能 C.甲状 发布时间:2017-05-31 01:29 │ 来源:www.tikuol.com 题型:单项选择题 问题: 尿17-OHCS水平可以反映()。A.肾上腺皮质功能B.肾上腺髓质功能C.甲状腺素水平D.雄激素水平E.雌激素水平
题型:单项选择题 阅读理解。Travel ArrangementsDate:15 April 2011 For :Wang MeiMay 4Leave BeijingAir China Flight CA 111ConfirmedPlease check-in at least twohours before leaving time10:00 a.m.May 5Arrive in SydneyHotel bus will take you to thehotel9:30 a.m.May 5Holiday in SydneyConfirmedIn:5 May 2011Out:10 May 2011Nights:5May 10Own arrangement with hostfamilyMay 14Leave SydneyQantas Airline Ltd Flight QF33312:30 p.m.May 14Arrive in PerthThe guide will collect you fromthe airport for four days returnbus trip to Monkey Mia15:30 p.mMay 18Leave PerthQantas Airline Ltd Flight QF44ConfirmedMay 18Raffles Hotel SingaporeIn:18 May 2011Out:19 May 2011Night:l11:00 a.m.May 19Arrive in Beijing16:00 p.m.1. How many days will Wang Mei's holiday last?A. 14. B. 16.C. 19. D. 20.2. At what time does Wang Mei have to be at the airport for her flight from Beijing? A. 8:00 a. m. B. 9:30 a. m.C. 10:00 a. m. D. 11:00 a. m.3. When she arrives in Perth, Wang Mei will travel from the airport . A. by taxiB. in a carC. on the travel-busD. with her host family4. Where will Wang Mei be on May 16?A. In a hotel in Perth. .B. On her return to Sydney.C. On a flight to Singapore.D. On a trip to Monkey Mia.5. In which country will Wang Mei stay before she returns to Beijing?A. Perth. B. Sydney.C. Singapore. D. Monkey Mia. 查看答案
题型:单项选择题 (6分)某学生用打点计时器研究小车的匀变速直线运动。他将打点计时器接到频率为50Hz的交流电源上,实验时得到一条如图所示的纸带。他在纸带上便于测量的地方选取第一个计时点,在这点下标明A,第六个计时点下标明B,第十一个计时点下标明C,第十六个计时点下标明D,测得AC长为14.56cm,BD长为19.72cm,则C点时小车的瞬时速度大小为 m/s。小车运动的加速度大小为 m/s2,(保留3位有效数字) 查看答案
题型:单项选择题 一理想变压器原、副线圈匝数比n1:n2=11:5,原线圈与正弦交变电源连接,输入电压u随时间t的变化规律如图所示,副线圈仅接入一个10 Ω的电阻。则[ ]A.流过电阻的最大电流是20 A B.与电阻并联的电压表的示数是141 V C.变压器的输入功率是1×103 W D.在交流电变化的一个周期内,电阻产生的焦耳热是2×103 J 查看答案