关于DS18B20以下叙述正确的是（） 是美国DALLAS公司推出的单线数字温度传感器。 温度值是通过输出端直接输入到CPU，无需A/D转换。 具有温度测量精确，不受外界干扰的优点。 可以通过数据线提供能量。
Refer to the exhibit. Which statement is true about where trust boundaries should be established in a network？（） Endpoint 1 is the only acceptable place to establish a trust boundary.。 Endpoint 1 is the optimal place to establish a trust boundary. Endpoints 2 and 3 are acceptable places to establish a trust boundary.。 Endpoint 2 is the only acceptable place to establish a trust boundary.。 Endpoint 2 is the optimal place to establish a trust boundary. Endpoints 1 and 3 are acceptable places to establish a trust boundary.。 Endpoints 1 and 2 are optimal places to establish a trust boundary. Endpoint 3 is an acceptable place to establish a trust boundary.。 Endpoints 2 and 3 are optimal places to establish a trust boundary. Endpoint 1 is an acceptable place to establish a trust boundary.。
内燃机型号N485Q解释不正确的是（） 四缸。 四冲程。 N系列。 缸径485mm。
有4种债券A、B、C、D面值均为1000元，期限都是3年。其中A以单利每年付息一次，年利率为8%；债券B以复利每年付息一次，年利率为4%；债券C以单利每年付息两次，每次利率是4%；债券D以复利每年付息两次，每次利率是2%。假设投资者认为未来3年的年折算率为r=8%，试比较4种债券的投资价值。
中国共产党成立以后，中国革命呈现出了哪些新面貌？
禁止用气瓶集合充装，（）计量来确定充装量。
