罗巴切夫斯基认为过直线外一点有几条直线与已知直线平行?()A、有且只有1条 B、至少三

题型:单项选择题

问题:

罗巴切夫斯基认为过直线外一点有几条直线与已知直线平行?()

A、有且只有1条

B、至少三条

C、至少有2条

D、至多三条

考点:数学思维与创新数学思维与创新题库
题型:单项选择题

500万吨铁矿石从海南运往上海,最佳的运输方式是( )

A.铁路

B.公路

C.航空

D.海运

题型:单项选择题

下列可引起听神经损害的药物是

A.环丙沙星
B.头孢唑啉
C.甲硝唑
D.阿米卡星
E.红霉素

题型:单项选择题

当前首选的促排卵药物是

A.维生素E

B.绒毛膜促性腺激素

C.黄体生成激素释放激素

D.绝经促性腺激素

E.氯米芬

题型:单项选择题

Long-Term Evolution (LTE) is a technological standard for wireless mobile broadband networks. LTE will make the use of the latest technologies. Orthogonal ______ Division Multiple Access ( a technology well suited to achieving high peak data rates in high-spectrum bandwidths) will be used on the downlink. On the uplink, LTE will use ______ Carrier Frequency Division Multiple Access, which offers advantages in power ______ and terminal battery life as compared to technologies used today. The latest antenna technologies will also be used, such as ______ , which employs multiple transmit and receive antennas. This results in numerous data paths effectively operating in ______ and-through appropriate coding/decoding-significant throughput gains.

A. parallel B. Serial
C. ManageabilityD. Adaptability

题型:单项选择题

管道运输的局限性较大,如无法灵活运送,对货物的要求很高,运输对象单一,所以其不具有通用性。

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