The new sixth-grade teacher, Sava, is like most teachers in schools. This morning, she is calling the attendance list and asking the students in the back of the room to be quiet. Sava{#blank#}1{#/blank#}(smile) at the students and looks happy. Sava doesn't really look different from other teachers,{#blank#}2{#/blank#}she is. Sava is a robot. She is remote controlled {#blank#}3{#/blank#}a person through a camera inside the robot. Although Sava is not ready to be a real teacher, the children enjoy her visits.

    China is leading the world in facial recognition algorithms（人脸识别算法）. It is reported that its best algorithm can recognize l0 million people {#blank#}1{#/blank#} a single mistake in less than a second.

    The top five of the 39 facial recognition algorithms in the word come from China, according to a test, {#blank#}2{#/blank#} released the results for 2018 last Friday. YITU Technology, {#blank#}3{#/blank#} Shanghai-based company that claimed both the top and second spot on the list, said that its top algorithm is able {#blank#}4{#/blank#} （recognize）nearly every person in a sample base of 10 million. However, "it is very likely for a human brain to make {#blank#}5{#/blank#} （mistake） in recognizing the identities of 100 people," the company said. Algorithms from Beijing-based company Sense Time {#blank#}6{#/blank#} （win） the third and fourth spot, while the Shenzhen Institutes of Advanced Technology（SIAT）claimed {#blank#}7{#/blank#} （five） in the test. YITU said that high facial recognition accuracy（精确）means that users gain {#blank#}8{#/blank#} （good） experiences when {#blank#}9{#/blank#} （use） related products. For example, when a user uses facial ID for payment on a smartphone, it will not authorize the payment for someone else with a similar {#blank#}10{#/blank#} （appear）as the user, the company noted.